Mathematics problems in senior one.
First, for the factorization of 25, 25=5*5, and the four integers are different, so there are +5, -5, and then+1,-1. The second is divided into two parts, A*B=25, and the number of a values in a part of b is positive, so the values are also positive. That is 1, 25, 1/25, with three * * *.